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《Acta Optica Sinica》 2010-12
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Study on Under-Gate Field Emission Display with Electron Beams Self-Focus Effect

Wu Chaoxing Zhang Yongai Zhang Jie Li Yu Guo Tailiang(College of Physics and Information Engineering,Fuzhou University,Fuzhou,Fujian 350002,China)  
An under-gate field emission display(FED) with a concave cathode is proposed.Ansys software is used to simulate the electric field distribution and the focus effect of electron beams.The curvature radius of a concave cathode which affects the self-focus is investigated.The results demonstrate that the concave cathode focuses electron beams which emit from cathode obviously.As the curvature radius of a concave cathode decreases,the focus effect is enhanced and the radius of spots on the anode decreases too.A 10cm×10cm FED with a good self-focus effect is successfully prepared using screen printing.The field emission image shows that the structure can decrease the size of spots and improve the resolution.The anode current is well modulated by a gate voltage of 100~250 V under an applied anode voltage of 600 V.
【Fund】: 国家863计划(2008AA03A313);; 福建省科技厅资助省属高校项目(2008F5001);; 福建省教育厅资助项目(J09003);; 福建省自然科学基金(2009J05145)资助课题
【CateGory Index】: TN873.95
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